Grinding machine



April 28, I925.

H.A.'BENEDICT ET AL GRINDING mcflnm Filed April 5. 1922 2 Sheets-Shge t 1 ummy He rshel aewdici, and

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WUNITED STATES,

iznnsnnn a. snnnnior, or east]? ORANGE, am) nnvaan at.

New instantv GRINDING MACHINE.

Application filed April 5,

To all whom it may concern:

Be 1t known that we HERsI-IEL A. BENE- DICT and EDVARD M. MoLLnR, citizens of the United States, residing at East Orange and Jersey City, in the counties of Essex and Hudson and State of New Jersey, have invented certain new and useful Improvements in Grinding Machines; and we do hereby declare the followingto be a full, clear. and exactdescription of the invention, such as will enable others skilled in the art to which it appertains to make and use thesame.

This invention relates more particularly to grinding machines adapted to operate upon a railway track for grinding or leveling the surface thereof. The objects of the invention are to provide an improved grind ing machine light in structure, but durable andcapable of doing the work required; to permit the ready removal and return of the device to the tracks; to provide a traveling abrasive or grinding wheel which will automatically reciprocate the desired distance without attention by the operator to utilize the same motive device for rotating and reciprocating the grinding element; to reciprocate the grinding element slowly and at the same time rotate it rapidly; to secure simplicity of construction and operation, and

to obtain other advantages and results as may be brought out in description.

Referring to the accompanying drawings in which like numerals of reference indicate similar parts throughout the several views; Figure 1 is a plan of a grinding machine the following.

embodying our invention; i

Flgure 2 1s a transverse sectlonal view on line 22 of Fig. 1;

Figure 3 is an end view of a portion of the device with the wheeling frame and wheel removed;

Figure 1 is a diagrammatic plan view of the gearing for obtaining reduction of speed and reversal of reciprocation, and

Figure 5 is an elevation of a portion of said gearing.

In the specific embodiment of the invention illustrated insaid drawings, the reference numeral 1 indicates the main frame consisting of a substantially rectan ular formation supporting near the corners t oreof, suitable flanged wheels 2 adapted to rest upon the rails of a'railwayjrack. For convenience in mounting these wheels, the por- 1922. Serial no. Maven tions of the frame 1 on which they are mounted are cylindrical and form axles for said wheels. Secured to the same frameportions which support the wheels, we have shown a pair of standards 8 which project upwardly from. the plane of the frame in parallel relation to each other. Connecting these standards are two parallel Z-bars= l which serve the double purpose of braces and of runways fora carriage 5 supporting the motor 6 and grinding wheel 7. The said carriage 5 is slidably mounted on the runways so as to reciprocate parallel to the railway track, and the parts are so arranged that the grinding wheel 7 will engage the track as it reciprocates and rotates. I

In order that the grinding wheel may be prevented from digging into the track,- we preferably arrange that it shall necessarily reciprocate, that is, have movement longitudinally of the track at all times while it is rotating. o accomplish this by providing a single motor to both rotate the grinding wheel and to reciprocate it. As shown the grinding wheel 7 is fast upon a shaft 8, preferably at one end thereof at the other end of which is secured a sprocket wheel 9 driven by a chain belt 10 from the motor 6. Any suitable gear ratio may be secured between the motor and' shaft 8 by substituting proper sizes of sprocket wheels to obtain the requisite speed of grinding wheel.

I Shaft 8 carrying the grinding wheel. and sprocket passes throusrh a gear box 11 carried by carriage 5. and intermediate the ends of said shaft within said box is a worm 12 of appropriate pitch and diameter to mesh with a worm wheel 13 fast on a transverse shaft 14 having also a worm 15 meshing with a pair of worm wheels 16. 16 fast upon stub shafts 17, 17 above and below the said worm. At one end of one of said stub shafts is a gear 18 and at th opposite end of the other stub shaft 17 is another gear 19. Since the worm wheels 16, 16 are rotatedin' opposite directions, gear wheels 18 and 19 will likewise turn in opposite directions. Said gear wheels 18 and 19 are each 111 mesh with other gear wheels 20 and respectively which latter are rotatably loose upon a common shaft 22. Obviously said gears 20 and 21 will rotate in opposite directions.

Connected with each of said gears 20 and 21 is a clutch member 23 andfl lrespectively which will-rotate with theirrespective gears MULLER, or Jnnsnir orrv,

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upon the common shaft 22. Between the said clutch members 23 and 24 and rotatably fast upon said shaft 22 is a slidable clutch member 25 having a middle groove 26 for receiving av forked end 27 and a lever 28 by means of which said clutch member 25 may be slid into engagement with either of the other clutch members and 24-. From the construction described, it will be observed that said common shaft 22 may be rotated in one direction or the other depending upon which of the clutch members 23 and 24 is engaged by the slidable clutch i'nember 25. It will also be observed that the train of gearing above described will also result in said shaft rotatin' very much slower than the shaft 8 on which the grinding wheel is mounted.

()n the outer end of the common shaft 22 is secured a pinion 29 which is constantly in m sh with a rack 30 fast with respect to the runways lso that as the shaft 22 and pinion 29 rotate it will move the carriage longitudinally of the runways. The direction of the mo: ent of said carriage will be controlled by the direction of rotation of said pinion which in turn is controlled by which way the lever has been swung for engaging the clutch members. (lensequently, in orr to rwerse the direction of movement of the carriage, the lever is swung from one extreme position to the other.

The lever 28 for shifting the slidable clutch member is fast upon arocker shaft 31 which projects upwardly out of the said gear case and has an operating lever 32 attached thereon. This operating lever preferably is provided with a compression spring 33 on its inner end which will operate to hold the said operating lever swung to either of its extreme positions. The outer end of the operating lever may be grasped by the operator to reverse the direction of m vement of the carriage at any time, but we preferably arrange to obtain such reversal automatically, and tothis end provide abar 3 adjacent said operating lever and provide thereon a pair of dogs 35 one or both of which. may be adjustable longitudinally of the said bar. Upon engage ment of the lever with either of said. dogs the momentum of the carriage will operate to force the lever to its other position which thereupon reverses the slidable clutch mem her and reverses the motion of the carriage until the lever comes into contact with the other dog. By;adjusting the. position of the dogs. 35, the distancewhieh the carriage and grindingwheel'i moves may be varied as found desirable.

In order to lower orelevate the grinding wheel, we preferably mount the runways 4 so: both; ends of the same may be moved in the some direction; imultaneously either up on down, T e. this and}, the standard preferably provided to slidably receive cleats; 36 at the ends of the runways l, said. cleats being fast with respect to said runways and secured also to a housing 37 through which pases a threaded bar This threaded bar is carried by the standard so as to be rotatable therein but prevented from longitudinal movement. lhe housing is screw threaded'to receive said threaded bar and consequently the housing will go up or down as the thr aded bar is rotated one way or the other. As both housings are made similar, rotation of the bars. simultaneously will elevate both ends or the runwaystogether. In order to obtain sinniltaneous ele vation of both, we have shown both of said threaded bars 38 provided with bevel gears fixed on the upper ends thereof each meshing with corresponding bevel gears L0 tast upon a cross-rod 41. This arrangement will consequently enable both threaded bars to be turned together as the cross rod is turned. Hand-wheel 4.2 orother suitable means may be provided for assisting the operator to readily rotate said cross-rod.

lls heretofore. noted, the frame 1 is in general rectangular in shave, and the flanged wheels are mounted upon the two end members :3 thereof. The two side members 414, of the frame are preferably positioned beyond the flanged wheels and thereby form a ready hand-hold for the workmen to bodily lift the machine from or onto the track. For ordinary purposes, however, it is. desirable to enable one man to manipulate the machine, and we accordingly arrange that the same may be, wheeled from the track. For this purpose is shown a U-frame 46 which is pivoted as at 47 near the end of each leg upon an axis parallel? to the track when the machine is in position thereon. The outer ends of the legs of said Ll-frame support road wheels rotatable in a plane transverse to the track. and it will be noted that when the U-frame is swung from its normal horizontal position to a substantially vertical position, the road wheels will be brought into engagement with the ground and will have operated to raise the main frame, at least the side thereof nearest the axis of pivoting of the U-frame, up from the track or ground. In this raised position of the frame, said frame may be grasped at its low side by" the operator and wheeled from the track or onto. it as desired. Upward swing of the U-frame. may be limited by a suitable outwardly projectingstop 49. Likewise suitable means may be, provided for retaining said U-frame in; its swung or upright position such as by means of the pivoted detent 50 shown, which in turn is held by a pin 51 or oth r device positioned behind it. We wish it understood, however, that this means is intended as illustratiye or as uitable reta n ng deride.

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.he made in the manufacture and use of our iniiproved grinding machine, and we do not wish to he understood as restrictlng ourselves to the exact structure shown except as set forth in the following claims when construed in the light of the prior art.

Having thus described the invention, we claim 1. A grinding machine including a frame, a runway mounted on the frame in association with a rack, a carriage mounted on the runway, a motor mounted on the carriage, a shaft mounted on the carriage transversely of the runway, a grinding wheel secured to the shaft, a pinion mounted on the carriage to engage the rack, gears connecting the pinion with the shaft including oppositely rotating gears and selective means for engaging the same to reverse the rotation of the pinion and means for driving the shaft from the motor. a

2. A device as specifiedin claim 1 in which the shaft carrying the grinding wheel is provided with a worm, a second worm shaft carrying a worm gear wheel is arranged perpendicular thereto so that its worm gear wheel meshes with the worm of the grinder shaft, two Worm gears are mounted on stub shafts engaging the second worm shaft on op osite sides, gears are mounted on said stu shafts, a rack engaging pinion is mounted on a shaft with two spaced gears which are meshed with the gears on said stub shafts and clutch means are slidalole on said pinion shaft adapted to engage one or the other of said gears.

3. A device for grinding railway tracks including a frame, a grinding Wheel carried thereby, wheels carried by the frame on axes perpendicular to the tracks for traveling thereon, ground-contacting wheels on axes perpendicular withrespect to the axes of the track engaging wheels, said ground-contacting wheels mounted on levers pivoted adja cent one rail side of the frame, whereby that side of the frame may be elevated as desired by the operation of said levers forcing said ground-contacting wheels under the frame to either engage the rail and adjust the engagement of the grinding wheel therewithor to permit the device to he traveled on the ground contacting wheels trans versely of the track. 1

In testimony whereof We affix our signatures.

HERSI-IEL A. BENEDICT. EDVARD M. MOLLER. 

